Washington (CNN) – Citing health reasons, Republican Party of Florida Chairman Dave Bitner will step down from his high profile post in late September, a party official confirms to CNN.

An election for the new chairman will take place September 23, as Florida Republicans gather in Orlando for a multi-day political event anchored by a presidential debate and straw poll.
Bitner is endorsing his vice chair, Lenny Curry, to succeed him as chair of one of the largest and most influential GOP state parties in the nation.

Earlier this year, Bitner was diagnosed with ALS, also known as Lou Gehrig's disease.